heymrun heym up to 0.0.104 Redis workflow node redis_node.py _get_accessible_credential improper authorization

Summaryinfo

A vulnerability categorized as critical has been discovered in heymrun heym up to 0.0.104. Affected by this issue is the function _get_accessible_credential of the file backend/app/services/node_execution/nodes/redis_node.py of the component Redis workflow node. The manipulation results in improper authorization. This vulnerability is identified as CVE-2026-100860. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in heymrun heym up to 0.0.104. Affected is the function _get_accessible_credential of the file backend/app/services/node_execution/nodes/redis_node.py of the component Redis workflow node. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

heym before 0.0.105 does not act on the result of the credential authorization lookup in the Redis workflow node (backend/app/services/node_execution/nodes/redis_node.py). When _get_accessible_credential returns None — because the credential ID does not exist or the caller is not authorized to use it — the node treats the lookup failure as an empty configuration and falls back to defaults, connecting to localhost:6379 with no password and executing the requested operation there. The same fallback occurs when an accessible credential has an empty config or no redis_host value. An authenticated workflow author who supplies a credential ID they do not own, or one that was deleted, therefore obtains a read/write connection to whatever Redis is listening on the backend's loopback interface instead of an error. Impact depends on the deployment: the stock docker-compose.yml ships no Redis, in which case the flaw surfaces as a misleading connection error rather than data exposure.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-100860 since 09/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 0.0.105 eliminates this vulnerability.

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Productinfo

Vendor

• heymrun

Name

• heym

Version

• 0.0.104

Website

• Product: https://github.com/heymrun/heym/

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